Water tempering and measuring system



April 24, 1951 A. EMERSON, JR., ET AL 2,550,050

WATER TEMPERING AND MEASURINC- SYSTEM Filed Feb. 15, 194e 2 sheets-sheet1 April 24, 1951 A. EMERSON, JR., ET AL 2,550,050

WATER TEMPERING AND MEASURING SYSTEM 2 Sheets-Shea?l 2 Filed Feb. l5,1946 #im Smm a# RFM Y mms m Ni E f O vdL Ne lfd A Af,

Patented pr. 24, 1951 UNITED STATES PATENT OFFICE WATER TEMPERING ANDMEASURING SYSTEM Alfred Emerson, Jr., New York, N. Y., and Fred L. A.Schmidt, Westleld, N. J., assignors to Cottage Donuts, Inc., New York,N. Y., `a cci'- poration of Maryland Application February 15, 1946,Serial No. 647,916

16 claims.

4*The present invention relates generally to a water tempering andmeasuring system, and it has particular relation to a system which isentirely automatic in operation for speedily mixing cold and hot lwatersfrom a building water supply system and delivering accurate measuredamounts i tempered water when desired, whereupon the system will reilitself automatically with suincient quantities of hot and cold water toproduce another supply of accurately tempered water.

An cbject'or the invention is the ,provision of anwater tempering systemwhereby large quantities of tempered water may be provided speedily andaccurately from the regular hot and cold water supply of a conventionalbuilding water system'. y

Another object of the invention is to provide simple, efficient andeconomical means for providing an inexhaustible supply of tempered waterin any measured quantity speedily and accurately.

n further object of the invention is the provision of improvedvmechanism responsiveto the weight ol the tempered water being withdrawnfor operating a suitable control system for automatically refilling thesupply tank with suitable quantities of hot and cold water from abuilding water supply system to replenish the supply of tempered watertherein. c L

Another object of the invention is to provide means whereby whentempered Water lis being withdrawn from the supply tank no het or coldwater will flow into the supply tank from the building supply system toaffect the temperature 0f the tempered water in the supply tank.

fA further ohglect ci the invention is the provie sion of means wherebyit will not be possible to withdraw a second quantity of water from thesupply tank, after one quantity of water has been withdrawn, until thesupply tank has been refilled and the temperature of the -water thereinhas been adjusted to that desired. l

Another objec; of the invention is to provide visual means or a signalfor indicating when the tank is being filled with water from thebuilding supply system, when, the water in thgtank has reached thedesired temperature, and when tempered water is being discharged fromthe tank.

Other and further objects and advantages of the invention reside in thedetailed construction or" the several parts, which results insimplicity, economy and eiiicency, and which will `he apparent from thefollowing description, wherein a preierred embodiment ofthe invention isshown, reference being had to the accompanying draw-t ings, forming apart hereof, wherein like numerf alsindicate like parts, in which: n

Figure l is a fragmentary diagrammatic view of apparatus constructed inaccordance with the principles of the invention, without showing theelectricV Wiring system connecting and operating the various partsthereof and i FigureZ is a schematic diagram of the electric wiringsystem connecting and operating the variW ous mechanical parts of theapparatus shown in Figure 1.

Referring now to the drawings, and particularly to Figure l, there isshown a conventional water tank It, which may or may not be insulated,mounted on a suitable supporting platform orstructure il. The tank Eilis provided with a suitable discharge outlet l2, having a conven tionalcombination manual and electricallyoperable switch control valve i3. Aninlet Supply pipe it is provided-for deliveringrhct water from abuildingwatcr supply system (notl shownl-to the tank lulanditis alsoprovided withaccmbination manual and electrically operable switchcontrol valve H5, of .conventional construction.

`A secondinlet supplypipe Il is provided for 1delivering cold .waterfrom. the building water supply system to the tank lil, and it islikewise providedv witha suitable Acolnbinaticn `manual and electricallyoperable switch control valve l5 of conventionalV construction.` Aconventional iloat switch it, having .a suitable dependingfloat ball 2l,extending into the tankrii) for engaging the water therein providesrneans'for automatically controlling the amcuntoi water to be held inthe supply tank ill. with av suitable outletcr overilow pipeV 22 forreasons hereinafter to be described in greater detail. A conventionalthermostatic control switch 23 having ,a .depending thermostatic bull:-25 adapted to be immersed in the water contained in the tank it when thesame is iilled, regulates the amount ci hot water entering the tankitt-o insure the desired temperature or the tempered water held withinthe supply tank at all times.

It will be noted that the tank le is associated with a suitableelectrically operable weighing scale 2t, which is of conventionalconstruction, and is provided with a weighing platform 26 adapted tosupporta can, pail or other container 27. rThe scale 2S is provided witha graduated balance arm or beam 29 adapted to support one or morecounter weights, as indicated at 3l, and is also provided witha'suitable sliding weight 32 operable thereover in the conventionalmanner.

-The graduated balance arm or beam 29 is connected with one side of anelectric circuit, as in dicated at 33 (see Fig. 2) and its laterallyex-y tending supporting structure 35 is provided with a suitableelectric Contact 3l, which is connected to theopposite side of the saineelectric circuit. Thus, when the metal balance arm or beam 29 swings.upwardlyand touches the electric contact 3l' of the supportingstructure 35, the electric circuit is closed, energizing the dischargevalve I3 to cause it to shut-oi the discharge outlet I2,

The tank Hl is alsoprovided 3 thereby stopping the delivery of temperedwater to the can or pail 21 resting on the scale platform 26.

Referring now to Figure 2 of the drawings, there is shown a wiringdiagram for the apparatus shown in Figure l. The various switches are inthe position they would be in when it is assumed that the current is offand the tank I is empty or only partially filled with water. An outsidesource of electric energy 44 is shown suitably connected to the variouscircuits of the apparatus by means of a conventional double pole knifeswitch 45. When the switch 45 is closed, the coil 46 of the main circuitto the iron core transformer 41 will be energized. The coil to thesecondary circuit of the transformer 41, which is indicated at 48,consequently also becomes energized, causing current to ow through thewire 49 to the relay 5I, and through its Contact arm 52, which isnormally closed with the contact 53. The current passing through theContact 53 and the wire 54 causes the coil of relay 55 to function,thereby drawing the contact arms 56, 51 and 58 to the left, which notonly opens the contacts 59 and 66 but also closes the contact arms 50,51 and 58 with the contacts 62, 63 and 94, respectively.

It will be observed that when contact 66 is opened it disconnects thecircuit to the amber light 61 through the wire 69. Contact 62, inclosing with the arm 56 of relay 55, is parallel with contact 53 ofrelay 5| through the wires 49 and 54, thereby maintaining current to thecoil of relay 55 and also to the green light 69.

When contact 59 of relay 55 is opened, it disconnects the circuit tocontact 12 of the relay 82 through the wire 69 and contact arm 83. Thiscontact 12 is normally open and, when closed, connects the circuitthrough the wire 13 to the tempered water discharge switch valve I3.

The contact 63 of relay 55, in closing with the arm 51 thereof, connectsthe circuit to the float switch I9 through the wire 14 and contact arm16, and also to the thermostatic control switch 23 through the wires 14,11 and contact arm 18 thereof. The contact 64 of relay 55, in closingwith the contact arm 58 thereof, causes the coil of relay to beenergized through the contact arm 50 and wire 80. This causes thecontact arms 52 and 19 to swing to the left, opening the contact 53 andclosing the contact 8| of relay 5|. It also energizes the circuit to thecoil of relay 82 through the wire 80, causing its contact arm 83 toclose with contact 12, which in turn prepares the circuit to thetempered water discharge valve I3 through the wire 13. The purpose ofclosing the circuit to the tempered water valve I3 through contact 12after the opening of contact 59 of relay 55 is to prevent the momentaryopening of the tempered water valve I3 when the switch 45 is operated tothe closed position.

The contact arm 52 of relay 5I, in opening with contact 53 thereof,opens the circuit paralleling contact 62 of relay 55 through theconnecting wire 54. Contact 8|, in closing with the contact arm 19 ofrelay 5|, is parallel with the circuit through contact 64 of relay 55through the wire 80, thereby locking the coil of relay 5I so that thecontact arms 52 and 19 remain in electric contact with the contacts 86and 8| thereof, respectively.

If the tank I0 is empty or only partially lled with water, the oat ball2| will drop down by gravity and cause the arm 19 of the float switch I9to close with its contact B1. In this position,

which is shown in Figure 2, the cold water inlet valve I8 will beenergized through the wire 88 and be in its open position, and, at thesame time, the coil of relay |02 will likewise be energized through theconnecting wires |05 and 92-C, causing its contact arms |03 and I I2 tobe moved to the left, opening contact IUI and closing contacts |06 and|I3.

When the electric circuit through contact I0| is broken by movement ofthe contact arm |03 of relay |02, it disconnects the circuit to contact91 of relay 89 through the connecting arm |03 and the wire |04, anddisconnects the green light 69 through the wire ||4. Relay |02 throughits connecting arm |03 makes electrical contact with the contact |06,energizing the red light 1| through the wire |01. Contact ||3, inclosing with the arm I|2 of relay |02, is parallel with the push-buttonswitch |09 through the wires and ||6 so that depressing this button,under such conditions, will have no effect whatsoever on the apparatus.

When the thermostatic control switch 23 is closed with its contact |00,i. e., when the temperature of the water in the tank I0 is below thetemperature at which the thermostat is set, and contact 63 of relay 55is closed with the arm 51 thereof, it will be apparent that the hotwater inlet valve I6 will be energized through the wires 14 and 9|, andconsequently opened. The coil of relay 89 will also be energized throughthe wire 85, causing its contact arms 94 and 96 to be moved to the left,thereby breaking with its contact 91 and connecting its electric circuitwith the contacts 98 and 99.

Contact 91 of relay 89, in opening disconnects its circuit to the greenlight 69 through the wire |04, contact arm |03 of relay |02, contact |0|of relay |02 and the wire II4. Contact 98, in closing with the contactarm 94, connects its circuit through the wire |01 to the red light 1|.Contact 99, in closing with the arm 95 of relay 89, parallels with thepush-button switch |08 through the wires I I1 and 95 so that depressingits button under such conditions will have no effect whatsoever on theapparatus.

It will be apparent that the contacts 98 and |96 are connected throughthe wire |01, and, therefore, both connect with the red light 1| so thatit will burn if either or both of the contacts 98 and |06 are closedwith their respective swinging contact arms 94 and |03. The contacts 91and |0| are connected in series through the wire |04 and contact arm |03of relay |02. Therefore,

both of them must be closed before the green light 69 will light up.

Contact 99 of relay 89 and contact I|3 of relay |02 are connected at ||8through the wires IIB and I I1, in parallel, with the push-button switch|08. Therefore, if either or both contacts 99 and ||3 are closed,closing the push-button switch |08 by depressing its button will have noeffect on the apparatus.

Assuming now a condition where the tank I0 is empty or only partiallyfilled with tempered water, and the temperature of the water is belowthe setting of the thermostat of the thermostatic switch 23, it will beapparent that the relays 89 and |02 will be energized through the wires85 and |05, respectively, and the red light 1| will be lighted. Undersuch conditions, the operation of either the push-button switch |08 orthe switch of the scale 24 will have no effect on the apparatus. Thescale switch formed by the metal balancing beam 29 and the contact 31 ofthe supacconto 5 porting structure 35 is connected in parallel throughthe wires II8 and H5 with the contact 62 of the relay 55.

When the tank I9 is filled with water, the iloat ball 2| will rise andactuate the float switch I9,

causing its contact arms 16 to move away from the Contact 81, thereby`breaking the circuit through the connecting wire I5 and cle-energizingthe relay IGZ. When the temperature of the water in the tank I9 rises tothe setting of the x thermostat of the thermostatic control switch 23,its contact arm 18 will move away from the contact |09, breaking thecircuit to the relay 89 through the connecting wire 85, which will bedeenergzed. Thereupon, the contacts 98 of relay 89 and |96 of relay |02,which are connected in parallel through the wire I 91, are opened andthe red light 1I will go out. Obviously, the contact arm |03 of relay|92 now connects with the contact IUI thereof, and contactarm 94 ofrelay 39 connects with Contact 91 thereof. Contacts I0! and. 91 areconnected in series through the wire |04, and both are closed, thuscompleting the circuit through the wire |94 to the green light 59,

which will be lighted. Under such conditions, 'a

the circuit to the coil of relay 55 will be deenergized when thepush-button switch |09 is actuated or depressed, which in turn causesthe yarm 51 of relay 55 to disengage with the contact It will beapparent with both the hot and cold i water valves I S and i8 open atthe same time that it is possible the tank I9 will become led with waterbefore the proper temperature is reached according to the thermostatsetting of the thermostatic switch 25. In such a case, the thermostaticswitch 23 will take over and permit the hot water valve I5 to open,letting in additional hot water until the water supply in the tank` l!!is properly tempered. Therefore, it is essential to provide a suitableoveriiow outlet pipe 22 to let the excess water in the tank I 0 flowaway until all the water in the tank I0 has been properly tempered andits level corresponds to the setting of the float ball 2| of the floatswitch I9.

Assuming now that the scale 24 has been set to operate at the desiredweight by use of the proper counterweights 9| and the sliding weight 32and the tank Il) is lled to capacity with tempered water, it will beapparent that, when the push-button switch |98 is depressed manually, itwill cause the coil of relay 55 to be deenergized, moving the contactarms 55, 51 and 58 to the position shown in Figure 2 of the draw-v ing.This movement of the contact arms 55, 51 and 58 closes the Contact arm56 with the contact 68, which, in turn, energizes the amber light 51through the wire 68. The Contact 82 is now open, disconnecting thecircuit to the green light 59 and red light 1I through the wire 54.Obviously, the green light 69 and redy light 1I will go out. The openingof contact 52 also opens through the wires 54 and |212 one side of thecircuit to the coil of relay 55 so that further y fi i) operation of thepush-button switch |08 will have no effect on the apparatus.

- It will be further apparent that when contact 59 closes with thecontact arm 51 of relay 55, as shown in Figure 2, it will cause thecircuit through the contact 12 of relay 82 and the wire 13 to beenergized, therebyopening the tempered water Ydischarge valve I3 todischarge water from the tank |19 into the can 21. When Contact 53 ofrelay 515 is open, as shown in Figure 2, it disconnects the electriccircuit to both the float switch- I9 and the thermostatic switch 23through the wire 14 so that neither the hot water valve IE nor the coldWater valve I8 can be energized or opened as long as the tempered waterdischarge valve I3 remains open.

After the water level in the tank I0 has receded slightly, the oat ball2| of float switch I9 will fall with thel receding water level, closingthe float switch I9 by moving its arm 15 into electric contact with thecontact 81. This, however, will have no effect on the apparatus becausecontact 63 remains in its open position. When the water level in thetank IIJ recedes to a level where thev depending thermostatic bulb 25 ofthe thermostatic control switch 2'3 is no longer submerged, thetemperature of the bulb 25 will cool to a point below the temperaturesetting of the thermostatic switch 23, causing its arm 18 to close intoelectric contact with the contact ISG. The closing of the arm 18 withthe contact I |19 of the thermostatic switch 23 also has no eiect on theapparatus since the contact 53 of relay 55 is still in its openposition, as shown in Figure 2.

'When the desired amount of tempered water' has been drawn from the tankI9, through its open discharge valve I3 and nozzle I2 into the can 21,sitting on the platform 26 of the scale 24, its weight will cause themetal balance beam or arm 29 to move into electric contact with thecontact 31 carried by the supporting arm 35 of the scale 24. This willclose the scale switch and energize the coil of relay 55 which, in turn,will cause the relay arms 59, 51 and 58 to move to the left and. closewith their respective contacts 52,53 and 54, which, at the same time,will open itsl contacts 55 and 59. This operating movement of the relay55 through its operating arm 56 instantly opens the circuit to the amberlight 61, thereby causing it to go out and at the same time causes thered light 1I to be lighted. It also closes the electric circuits to boththe hot water inlet valve I5 and the cold water inlet valve I8, causingboth valves to open, letting in 'both hot and cold waters into the tankI0, The relay 55 `is locked in its closed position, which is opposite tothat shown in Figure 2, through its contact arm 59 and its contact 62.It will be apparent that once the contact on the scale switch is opened,as when the can 21 of tempered water is removed from the weighingplatform 25, and the balance'arm 29 drops away from the contact 91,further opening or closing of said switchl will have no eiect on theapparatus.

r The apparatus shown has been designed to koperateon a regular 110 voltA. C. main circuit,

and Athe push-button switch |03, amber light 61, red light' 1|, andgreen light 59 are adapted to be operated on an auxiliary or secondarycircuit ci approximately 24 volts.

In operating the apparatus,l the thermostat of the herniostaticswitch'23 is setto the desired temperature. f The 'double ,polek knifeswitch 4,5 is closed, energizing the main circuit through the wires 90and 92. The iron core transformer 41 is likewise energized through itswires |20 and |25, which are connected in parallel with the main circuitwires 90 and 92. The tank I0, which is empty of water, will begin tofill through the hot and cold water inlet valves I6 and I8, and the redlight 1I will be lighted and remain lighted until the tank I is not onlyfilled with water but the water has become tempered to the desireddegree, which is the setting on the thermostat of the thermostaticswitch 23. When the tank I0 is filled and the water therein has reachedthe desired temperature, the red light 1I will go out and the greenlight 69 will become lighted.

The weighing scale 24 is now set to the desired weight and thepush-button switch |08 is ready to be manually actuated or depressed.Actuation of the push-button |08 will cause the tempered water dischargevalve I3 to open, discharging tempered water into the can 21 through thedischarge nozzle I2. At the same time, the pushbutton |08 is depressed,the green light goes out and the amber light 61 becomes lighted,indicating that tempered water is being discharged from the tank I0.After the desired weight of water has been run into the can 21 and thescale switch closes by the graduated balance beam 29 contacting thecontact 31 thereof, the valve I3 is closed and the ow of tempered waterfrom the tank I0 into the can 21 automatically ceases. Thereupon, theamber light 61 will go out and the red light 1| will become lighted,which indicates that the hot and cold water inlet valves I6 and I8 havebeen reopened to deliver more water to refill the tank I0. This cycle ofoperation may be repeated as often as desired as long as the main switch45 is kept closed, and an inexhaustible supply of tempered Water isalways present in the tank I 0. Thus, it will be obvious that we havedevised a relatively simple, inexpensive and foolproof system fortempering and measuring water from the normal water supply system of abuilding.

Although we have described in detail only one embodiment of theinvention, it will be readily apparent to those skilled in the art thatthe same is not so limited, but that various modications may be madetherein without departing from the spirit thereof or from the scope ofthe appended claims.

What we claim is:

1. In a water tempering and measuring apparatus, a supply tank, an inletincluding a valve for delivering hot water from a source of supply tosaid supply tank, an inlet including a valve for delivering cold waterfrom a source of supply to said supply tank, a temperature controladapted to open and close said hot water inlet valve, a liquid levelcontrol adapted to open and close said cold water inlet valve, an outletfor discharging tempered water from said supply tank, said outletincluding a valve for controlling the discharge of tempered water fromsaid supply tank, and a weight control for measuring the tempered waterdischarged through said outlet, said weight control being connectedoperatively with said outlet valve to close the same when the desiredamount of tempered water has been withdrawn from said supply tank.

2. In a water tempering and measuring apparatus, a supply tank, an inletincluding a valve for delivering hot water from a source of supply tosaid supply tank, an inlet including a valve for delivering cold waterfrom a source of supply to said supply tank, a thermostat adapted toopen and close said hot water inlet valve, a oat adapted to open andclose said cold water inlet valve, an outlet including a valve forcontrolling the discharge of tempered water from said supply tank, and aWeighing device for measuring the amount of tempered water dischargedthrough said outlet, said Weighing device being connected operativelywith said outlet valve to close the same when the desired quantity oftempered water has been withdrawn through said discharge outlet.

3. In a water tempering and measuring apparatus, a supply tank, an inletincluding a valve for delivering hot water from a source of supply tosaid supply tank, an inlet including a valve for delivering cold waterfrom a source of supply to said supply tank, a thermostat for openingand closing said hot water inlet valve, a float for opening and closingsaid cold water inlet valve, an outlet including a valve for controllingthe discharge of tempered water from said supply tank, a weighing devicefor measuring the amount of tempered water discharged through saidoutlet, said Weighing device being connected with said outlet valve toclose the same when the desired quantity of tempered water has beenwithdrawn through said discharge outlet, and a control for opening saidoutlet valve to permit the discharge of tempered water from said supplytank.

4. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank, an inlet including a valve for delivering hotwater from an outside source of supply to said supply tank, an inletincluding a valve for delivering cold Water from an outside source 0fsupply to said supply tank, a thermostat for opening and closing saidhot water inlet valve, a float for opening and closing said cold waterinlet valve, an outlet including an electrically operable valve forcontrolling the discharge of tempered water from said supply tank, aweighing device for measuring the tempered water discharged through saidoutlet, said weighing device being connected electrically with saidoutlet valve for closing the same when the desired quantity of temperedwater has been withdrawn from said supply tank, and an electric switchfor opening said outlet valve to discharge tempered water from saidsupply tank.

5. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank, an inlet including an electrically operable valvefor delivering hot water from an outside source of supply to said supplytank, an inlet including an electrically operable valve for deliveringcold water from an outside source of supply to said supply tank, athermostat connected electrically with said inlet hot water valve foropening and closing the same, said thermostat being responsive to thetemperature of the water in said supply tank, a oat connectedelectrically with said cold water valve for opening and closing thesame, said float being responsive to the height of the water in saidsupply tank, an outlet including an electrically operable Valve forcontrolling the discharge of tempered water from said supply tank, adevice for measuring the tempered water discharged from said supplytank, said measuring device being connected electrically with saidoutlet valve to close the same when the desired quantity of temperedWater has been withdrawn from said supply tank, an electric switchconnected with said outlet valve for opening the same to dischargetempered water from said supply tank.

6. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank, an inlet including an electrically operable valvefor delivering hot water from an outside source of supply to said supplytank, an inlet including an electrically operable valve for deliveringcold water from an outside source of supply to said supply tank, athermostat connected electrically with said inlet hot water valve foropening and closing the same, said thermostat being responsive to thetemperature of the water in said supply tank, a float connectedelectrically with said inlet cold water valve for opening and closingthe same, said float being responsive to the height of the water in saidsupply tank, an outlet including an electrically operable valve forcontrolling the disi charge of tempered water from said suply tank, adevice for measuring the tempered water discharged from said supplytank, said measuring device being connected electrically with saidoutlet valve to close the sam ii when the desired quantity of temperedwater has been withdrawn from said supply tank, an electric switchconnected with said outlet valve for opening the same to dischargetempered water from said supply tank, said outlet valve being connectedin an electric circuit with said thermostat and iloat whereby neitherhotl nor cold water can be taken into said supply tank while temperedwater is being withdrawn therefrom.

7. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank, an inlet including an electrically operable valvefor delivering hot water from an outside source of supply to said supplytank, an inlet including an electrically operable valve for deliveringcold water from an outside source of supply to said supply tank, athermostat connected electrically with said inlet hot water valve foropening and closing the same, said thermostat being responsive to thetemperature of the water in said supply tank, a iloat connectedelectrically with said inlet cold Water valve for opening and closingthe same, said iloat being responsive to the height of the water in saidsuply tank, a device for measuring the tempered water discharged fromsaid. supply tank, said measuring device being connected electricallywith said outlet valve to close the same when the desired quantity oftempered water has been withdrawn from said supply tank, an electricswitch connected with said outlet valve for opening the same todischarge tempered water from said supply tank, said thermostat and saidiloat being connected with said switch whereby it will be renderedinoperative so that tempered water cannot be withdrawn from said supplytank until the water contained therein has had its temperature adjustedto the desired degree.

8. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank having an overflow outlet, an inlet connected withan outside source of hot water supply for delivering hot water to saidsupply tank, an electric operable valve mounted in said inlet forcontrolling the delivery of hot water to said supply tank, an inletconnected with an outside source of cold water supply for deliveringcold water to said supply tank, an electric operable valve mounted insaid inlet for controlling the delivery of cold Water to said supplytank, an electric operable thermostatic switch for controlling theamount of hot water deliverable to said supply tank, said thermostaticswitch being operable through a thermometer extending into said supplytank, an electric operable oat switch for con- 10 trolling the amount ofcold water deliverable t0 said supply tank, said oat switch beingoperable through a float extending into said supply tank, an outlet fordischarging tempered water from said supply tank, a device for weighingthe tempered water discharged from said supply tank, and an electricoperable valve mounted in said discharge outlet and adapted to be closedby said weighing device for controlling the amount of tempered waterdischarged from said supply tank.

9. In a water tempering end measuring apparatus, a source of electricenergy, a supply tank havingV an overflow outlet, an inlet connected toan outside source or supply for delivering hot water to said supplytank, an electric operable valve for controlling the delivery of hotwater to said supply tank, an inlet for delivering cold water to saidsupply tank, an electric operable valve for controlling the delivery ofcold water to said supply tank, an electric operable thermostatic switchfor opening and closing said hot water inlet valve, said thermostaticswitch having a thermometer extending into said supply tank, an electricoperable iloat switch for controlling the amount of cold waterdeliverable to said supply tank, said float switch having its floatextending into said supply tank, an outlet for discharging temperedwater from said supply tank, a device for weighing the tempered waterdischarged from said supply tank, an electric operable valve forcontrolling the delivery of tempered water from said supply tank, and anelectric switch `for opening said valve to discharge tempered water fromsaid supply tank, said. weighing `device being connected electricallywith said discharge valve for closing the same when the desired amountof tempered water has been withdrawn from said supply tank.

10. In a water temperaing a measuring apparatus, a source of electricenergy, a supply tank having an overflow outlet, an inlet for deliveringhot water from an outside source of supply to said supply tank, anelectric operable valve for 4controlling the delivery of hot water tosaid supply tank, an inlet for delivering cold water from an outsidesource of Supply to said supply tank, an electric operable valve forcontrolling the delivery of cold water to said supply tank, an electricthermostati-e switch responsive to temperature changes in said supplytank for opening and closing said hot water inlet valve, an electricoperable iloat switch responsive to the amount of water in said supplytank for controlling the. opening and closing of said cold water inletvalve, an outlet for discharging tempered water from .said supply tank,an electric operable valve for controlling the delivery of temperedwater from said supply tank, a device for weighing the tempered waterbeing discharged from said supply tank, said weighing device beingconnected in an electric circuit with said outlet valve for closing thesame when the desired quantity of tempered water has been discharged,and an electric switch for opening said outlet valve for withdrawinganother supply or" tempered water from said supply tank.

11. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank having an overliow outlet, an inlet including anelectric operable valve for delivering hot water to said supply tank, aninlet including an electric operable valve for delivering cold water tosaid supply tank, an electric iioat switch for opening and closing saidcold water inlet valve, an electric thermostatic switch for opening andclosing the hot water inlet valve, an outlet including an electricoperable valve for discharging tempered water from said supply tank, adevice for Weighing the amount of tempered water discharged from saidsupply tank, said weighing device being connected electrically with saidoutlet valve for closing the same when the desired quantity of water hasbeen withdrawn rom said supply tank, and a manually operable switch foropening said outlet valve, said inlet valves being connectedelectrically with said outlet valve whereby the former are renderedinoperative when said outlet valve is open and tempered water is beingdischarged therethrough.

12. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank having an overiow outlet, an electric operablevalve for delivering hot water to said supply tank, an electric operablevalve for delivering cold water to said supply tank, an electricoperable oat switch for opening and closing said cold water inlet valve,an electric thermostatic switch for opening and closing said hot waterinlet valve, an electric operable valve for discharging empered waterfrom said supply tank, a device for weighing the tempered waterdischarged from said supply tank, said weighing device beingelectrically connected with said outlet valve for closing the same whena desired amount of tempered water has been withdrawn, and an electricswitch Y for opening said outlet valve to withdraw tempered water fromsaid supply tank, a circuit for connecting said outlet valveelectrically with said hot and cold water valves to render the sameinoperable when said outlet valve is open, a circuit for connecting saidinlet valves electrically with said outlet valve to render the sameinoperable when either said hot or cold water inlet valve is open.

13. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank having an overflow outlet, an electric operablevalve for delivering hot water to said supply tank, an electric operablevalve for delivering cold water to said supply tank, an electric oatswitch for opening and closing said cold water valve, an electricthermostatic switch for opening and closing said hot water inlet valve,an electric operable outlet valve for discharging tempered water fromsaid supply tank, a device for weighing the tempered water dischargedfrom said supply tank, said weighing device being operatively connectedwith said outlet valve for closing the same when a desired quantity oftempered water has been withdrawn, a switch for opening said outletvalve for discharging tempered water from said supply tank, and a visualsignal actuated by said thermostat for indicating when the water in saidsupply tank is tempered and ready t0 be withdrawn.

14. In a water tempering and measuring apparatus, a. source of electricenergy, a supply tank having an overow outlet, an electric operablevalve for delivering hot water to said supply tank,

an electric operable valve for delivering cold water to said supplytank, an electric iioat switch for opening and closing said cold watervalve, an electric thermostatic switch for opening and closing the hotwater valve, an electric operable valve for controlling the discharge oftempered water from said supply tank, a device for weighing the amountof tempered water from said supply tank, said weighing device beingconnected electrically with said discharge valve for closing the samewhen the desired quantity of tempered water has been withdrawn, a switchfor opening said discharge valve to discharge tempered water from saidsupply tank, and a signal operatively connected with said dischargevalve for indicating when the same is open and tempered water is beingwithdrawn from said supply tank.

15. In a water tempering and measuring apparatus, a source of electricenergy, a supply tank having an overflow outlet, an electric operableValve for delivering hot water to said supply tank, an electric operablevalve for delivering cold water to said supply tank, an electric floatfor opening and closing said cold water valve, an electric thermostaticswitch for opening and closing said hot water valve, an electricoperable valve for discharging tempered water from said supply tank, adevice for weighing the amount of tempered water discharged from saidsupply tank, said weighing device being connected electrically with saiddischarge valve for closing the same when a desired quantity of temperedwater has been discharged, a switch for opening said discharge valve todischarge tempered water from said supply tank, and a signal operativelyconnected in series with said hot and cold water inlet valves forindicating when either hot or cold water is being delivered to saidsupply tank.

16. In a 4water tempering and measuring apparatus, a source of electricenergy, a Supply tank having an overflow outlet, an electric operablevalve for delivering hot water to said supply tank, an electric operablevalve for delivering cold water to said supply tank, an electric floatswitch for opening and closing said cold water valve, an electricthermostatic switch for opening and closing said hot water valve, anelectric operable valve for discharging tempered water from said supplytank, a device for weighing the tempered water discharged from saidsupply tank, said weighing device being connected electrically with saiddischarge valve to close the same when a desired quantity of temperedWater has been withdrawn, a switch for opening said discharge valve todischarge tempered water from said supf ply tank, a signal actuated bysaid thermostat for indicating when said supply tank is lled withtempered water, a signal operatively connected with said discharge valvefor indicating when tempered water is being withdrawn, and a signaloperatively connected in series with said hot and cold Water inletvalves for indicating when either cold or hot water is being deliveredto said supply tank.

ALFRED EMERSON, JR.

FRED L. A. SCHMIDT.

REFERENCES CITED The following references are of record in the iile ofthis patent:

UNITED STATES PATENTS Number Name Date 760,443 Fulton May 24, 1904775,021 Waterman Nov. 15, 1904 1,110,137 Johnson Sept. 8, 1914 1,636,698Leonard et al July 26, 1927 1,774,475 Bruno Aug. 26, 1930 2,321,573Cha-ce June 8, 1943 2,332,438 Clifford Oct. 19, 1943 2,346,259 HutchingsApr. l1, 1944 2,387,894 Fannin Oct. 30, 1945

